Summed up beautifully. D4h will never argue this, because it is a coffin nail for his views. Black folks are simply faster. The fact that Usain Bolt is far and away the fastest human in recorded history and is not from the southern US even blows away the excuse that the reason blacks are so fast and strong is because the best slaves were bred with the best slaves to get hybrid vigor. Bolt doesn't come from American slaves in all likelihood. Blacks are just faster. Generally are stronger also due to more muscle, however I will point out that viking progeny dominate the world's strongest man competitions, like Magnus Magnusson and other Nordic dudes with way too many consonants in their last names. South African white guys also do well in those insane contests.
The reason he will never acknowledge this fact is because he would have to recognize the inverse...that when all the cards are on the table, white folks tend to outperform blacks in every measurable way academically. Grade point averages, SAT,ACT,...any standardized test or measure of memory or mental aptitude. There are always exceptions to the rule, 1 of my black sisters is very smart and a poor athlete, there are whites that are great athletes but not very bright. Exceptions are just that though, outliers, not the rule
These differences don't make any race of people "better" than any other race. Just different. Corvettes are fast, dump trucks are powerful. Does that make a corvette "better" than a dumper? No. They are both good at what they do. We need to quit with the PC bullcrap and the hate and just accept eachother. Embrace our differences, that's what makes America great. Doesn't matter who you are or what you came from, if you work hard here you can raise a family and have a good life. Success varies based on decisions and effort.
Everybody needs to quit whining, put on their boots and get to work. Life is hard and our country is in bad shape financially. We need everyone to pull their weight so we can work our way out of decades of excess spending.